FG-23329-D65

Acoustic Interface Design Guide 2010 MEMS MICROPHONES SPECIALTY MICROPHONES BOOMS AND SENSORS ACCELEROMETERS & ACOUSTIC DAMPER SCREENS SPECIALTY SPEAKERS CUSTOM ASSEMBLIES ACOUSTIC SOFTWARE MICROPHONE AND SPEAKER BASICS Discover your next acoustic interface solution. Knowles Acoustics offers you a full spectrum of MEMS microphones, specialty microphones, balanced armature speakers, custom assemblies, and sound conditioning software. This application guide will help you select the right acoustic interface solution. Knowles reserves the right to change designs and specifications without prior notice. Should a safety concern arise regarding this product, please contact us immediately for technical consultation. Knowles cannot assume responsibility for any problems arising out of the use of this product. This information does not convey any license by any implication under any patents or other right. 2 www.knowles.com We can help you every step of the way. It all starts with your application. Or it starts with an idea you may have. For support from concept to design to sub-assembly, or any step along the way, just call us. Or visit us at www.knowles.com Table of Contents MICROPHONES - MEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 SPECIALTY TRANSDUCERS - MICROPHONES . . . . . . . . . . . . . . . . 7-11 SPECIALTY TRANSDUCERS - BOOMS & SENSORS . . . . . . . . . . . . .12-15 ACCELEROMETERS & ACOUSTIC DAMPER SCREENS . . . . . . . . . . . . . 16 SPECIALTY TRANSDUCERS - SPEAKERS . . . . . . . . . . . . . . . . . . 17-26 CUSTOM ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ACOUSTIC SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 MICROPHONE AND SPEAKER BASICS . . . . . . . . . . . . . . . . . . . . 29-30 www.knowles.com 3 MICROPHONES – MEMS SiSonic™ MEMS Microphones Built on our CMOS/MEMS technology platform, the SiSonic™ silicon-based MEMS microphone series is a step ahead of the competition with product shipments exceeding 1 billion units to date. The proven and evolving design series continues to support high-performance, high-density innovation in such applications as cell phones, smart phones, laptop computers, sensors, digital still cameras, portable music players, and other portable electronic devices. Design variables include ever-smaller sizes, lower profiles and mounting options, increased output capacities, and new digital audio options that eliminate analog noise. For manufacturers, surface mount designs eliminate off-line subassembly production costs. Customized designs are supplied on tape-and-reel and can be run through standard automatic pick-n-place equipment during in-line surface mount manufacturing. The microphones can also be integrated with our patented IntelliSonic™ software and special porting designs to provide a precisely customized sound. • New MaxRF models eliminate GSM/TDMA burst noise and provide wide-band RF noise suppression • UltraMini footprint - less than 11.5mm 2 (SPU Series) • Slim UltraMini footprint - less than 8.5mm 2 (SPQ Series) • Digital mics eliminate analog noise • Integrated designs with differential or switchable gain • Zero Height Mic ™ for thinnest ever designs Part Numbering 4 www.knowles.com MICROPHONES – MEMS Ultrasonic Acoustic Sensor • High frequency functionality • Wide range of applications • Micro-sized sensing and actuation 20 TYPICAL SENSITIVITY RELATIVE TO 1 kHz (dB) Derived from our industry-leading MEMS silicon surface mount microphone technology, our new ultrasonic sensor designs function on a high frequency band. Sensor designs are possible across a wide spectrum of applications requiring highly miniaturized solutions for sensing and actuation/signaling. 15 10 5 0 -5 -10 -15 -20 2 3 1k 4 5 6 789 10k 2 3 4 5 6 789 100k 2 3 4 5 6 7 89 10k FREQUENCY (Hz) Model SPM0404UD5 Description Directivity Unity Gain Omni Supply Voltage Sensitivity @1kHz (min-max) (dB re1V/1Pa) 1.5 to 3.6v -42.0 Output Impedance (Ohms)